394 highway speed lifter noise
#1
394 highway speed lifter noise
I have a 61 Dynamic 88 with the 394 2bbl. Just recently it started making a fairly loud lifter/valve noise but only at highway speed around 70mph. Sometimes all I have to is get off the highway and cruise around 50mph and it goes away, other times I might have to let it sit for 10 minutes and then it's fine. If I cruise the back roads around 50-55 mph It will go all day without any noise at all I'm not a mechanic but I'm not mechanically challenged either so I was thinking possibly a gummed up screen on the oil pump or something like that perhaps? Any thoughts on this would be greatly appreciated thanks, Jeff.
#2
My old 63 394 would go 3000 miles between oil changes without a noise any miles after that and a lifter would stick. Try a oil change and a pint of your favorite upper valve train lubricant and see what happens. Sticky lifters are common on all first generation Old's V8's.... Tedd
#7
If it is lifter noise and not rockets then you should use E.O.S. engine oil supplement which was designed for the 394 lifter noise. I add it when I do an oil change and it works, the product is available here at any GM dealer and any AC Delco dealer/jobber parts supplier.
Steve
Steve
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